Loose-leaf binder.



B.. B. WILSON.

LoosB LEAP BINDER.

APPLICATION FILED SBPT.26, 1907.

Patented Mar. 2, 1909.

m: NoRRls PETER: cal. wAsmNc'roN. D. c.

RALPH B. WILSON, OF CHICAGO, ILLINOIS.

LOOSE-LEAF BINDER.

Specification of-Letters Patent.

Patented March 2, 1909.

Application i1ed September 26, 1907. Serial No. 394,743.

To all whom fit may concern.'

Be it known that I, Ita-Urn B. ViLsoN, a citizen of the United States, and a resident of Chicago, Cook county, Illinois, have invented certain new and useful Improvements in Loose-Leaf Binders; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in loose leaf binders of that class known as transfer binders, and in which a bottom clamping plate is provided with a plurality of upright impaling posts which project through an upper clamping plate on which are carried means for rigidly engaging the upper clamping plate to the impaling posts. Devices of the kind have often been provided with spring actuated locking means for engaging the movable clamping plate to the impaling posts and in some instances oppositely movable bolts have been provided which act to force or spring the posts oppositely to engage the same against the clamping plate. Most of such devices however, have been somewhat expensive to manufacture and frequently such constructions do not hold the parts in operative relation with suflicient rigidity to prevent displacement of the leaves.

It is an object of this invention to afford an exceedingly cheap, simple and durable device of the class described in which the impaling posts are positively engaged against the clamping plate by means of oppositely movable bolts which are actuated from the end of the clamping plate into engagement with the impaling posts.

It is also an object of the invention to afford a construction in which the upper clamping plate may be very cheaply constructed of sheet metal affording an interior space for the bolts and permitting the top 0f the binding plate to be finished smooth.

It is finally an object of the invention to afford an upper tubular clamping plate for the purpose specified having therein positively actuated bolts positioned to positively engage the impaling posts when projected through the apertures in said clamping plate and adapted to be forced into or out of engagement by means of a suitable key inserted in the end of the clamping plate.

The invention embraces many novel features and consists in the matters hereinafter described and more fully pointed out and defined in the appended claims.

In the drawings: Figure 1 is a vertical section taken longitudinally of the clamping plates and showing the impaling posts in elevation. Fig. 9. is an enlarged horizontal section taken through the upper clamping plate and above the bolts. Fig. 3 is a section taken on line 3 3 of Fig. 2. Fig 4l is an enlarged detail showing the clamping plate and parts therein in elevation and the covering material for the clamping plate in section. Fig. 5 is a view partly in elevation and partly in longitudinal section of the bolts showing the same removed from the clamping plate.

As shown in the drawings: A indicates a clamping bottom binding or clamp'ing plate comprising a strap or bar of metal in which the impaling posts B-B are rigidly engaged by threading to extend at right angles with the face thereof, as shown in Fig. l. Said bottom binding plate if desired may be constructed of sheet metal in tubular form in which event the core may be constructed of suit-able rigid material in which are engaged nuts a positioned to register with apertures in the top of the clamping plate to receive the threaded ends of the impaling posts, and surrounding and infolding said binding plate as is usual, is a layer of fabric a such as canvas which affords the connection and hinge with the board bottom cover. The upper clamping plate consists of the sheet of metal A folded upon itself as shown in Figs. 3 and l to afford a rounded back and parallel top and bottom sides, the front edges of said sheet indicated by z2-a3 being folded over eachother as shown in Figs. 3 and el; said edges overlapping and inclining from the bottom rearwardly at a suitable angle to permit the board cover A2 to be swung back upon the impaling posts to the greatest extent possible. Said board cover A2 as shown is secured to the clamping plate A as is usual, that is to say a layer or layers of canvas or canvas and leather are wrapped about the clamping plate and eX- tend upon the board cover A2, being firmly cemented or glued to each to afford a strong and hinged connection as shown in Fig. Ll.

Apertures are pr vided as is usual through the clamping plate through which extend the impaling posts, and slidably secured between said apertures and in position to engage on the inner sides of said impaling posts are the bolts C-G. The bolt G as shown, is of a width across its face approximately equal to the width of the chamber or bore in the clamping plate and is provided with a notch or seat in its end adjacent to the impaling post B and is flanged upwardly as shown in Figs. l, 2 and 3 to aiiiord a broad bearing on said post, said flange c being formed if desired with a suitable die. Integrally connected with the bolt C and ex- Vtending along the back of the clamping plate is a stem c provided with a longitudinal internally threaded bore adapted to receive the threaded stem c2 as shown in Fig. 5 integral with the adjusting' rod D which extends to one end of the clamping plate and at its extremity is angular to permit engagement with a suitable key.

Suitable collars CZ-CZ which may be integral with the adjusting rod are provided thereon affording between the saine space to permit engagement with the bolt C which engages the nnpaling post B. For this purpose as shown in Fig. 3 said bolt C consists of a plate of suitable metal stamped to afford a 'suitable flange c* for engagement with the impaling post B as before described with reference to the bolt C and fiange o and at its rear edge said plate is adapted to be rolled around the adjusting rod D between the collars d -c As shown also said bolt is longitudinally slotted to receive a pin or rivet which extends through the upper and lower sides of the clamping plate, and serves to rigidly hold the sides of the clamping plate from separating apart, in this being assisted by the rivets 0G shown in Fig. 2.

In assembling, the bolt C and adjusting stem D having been inserted in the bore of the clamping plate, the rivet o serves as a stop to limit the inward adjustment. The rivet c5 is then inserted through the slot in the bolt C and is closed down and rotation of the adjusting stem D serves to retract said bolts from the impaling posts apertures sufiicient to permit the insertion of the impaling posts. Opposite rotation of the adjusting stem then obviously forces said bolts oppositely pressing the impaling posts oppositely from each other and jamming the same against the edges of the clamping plate at said apertures.

Before binding the clamping plate and plate on the other.

block of wood affords the bearing for said rod on the front side while said rod has a bearing in the rounded end of said clamping At the opposite end of' the clamping pla-te a block of' wood E is inserted. These of course when the binding is complete are concealed from view by the covering material affording an attractive finish.

rlhe operation is thought to be obvious from the foregoing description. The rotation of the adjusting stem in one direction serves to retract the bolt from the impaling post permitting the upper clamping plate to slide freely on the impaling posts, while rotation in the opposite direction firmly jams the impaling posts in engagement with the clamping plates. The rivets (f3-c6 serve as stops and act at all times to limit the movement of the bolts longitudinally in the clamping plate and what is perhaps more important, insure great strength of the clamping plate while permitting an exceedingly cheap construction of the same, namely a construction from comparatively thin sheet metal rolled or formed to afford a tubular conformation of great'strength.

Of course details of construction may be `varied. l therefore do not purpose limiting this application for patent otherwise than necessitated by the prior art.

l claim as my invention:

l. In a device of the class described a clamping plate embracing a strip of sheet metal rolled or formed to provide a rounded back and parallel sides and having the front edges of said sheet or strip overlapping, oppositely movable bolts in said casing thus formed, a threaded stein secured to one of said bolts and a threaded rod engaged with the other bolt, said rod engaging the stem for adjusting said bolts.

2. in a device of the class described a clamping plate comprising a plate or strip of sheet metal formed to provide a rounded back and parallel sides with the front edges of the plate overlapping and inclined at an angle with the plane of the clamping surface of said plate, oppositely movable, notched locking bolts, upwardly extending flanges integral with the bolts at the notches, an integral internally threaded stem eXtending from one of the locking bolts and a threaded rod pivotally connected with the other bolt and engaging in the stem.

3. In a device of the class described, a clamping plate embracing a strip of sheet metal rolled or formed to provide a rounded cover it is desirable to close the ends of the i back and parallel sides and having the front clamping plate. This not only increases the l edges of said sheet or strip overlapping, and

directed rearwardly at an angle with the contact surface of the plate means rigidly engaging the parallel sides in rigid relation to prevent the same springing outwardly, blocks in each end of the casing thus i formed, notched bolts in said casing having flanges at the notches to provide a long bearing, a tubular internally threaded stem engaged to one of said bolts and a shaft threaded on one end to engage in said stem and connect with the other bolt adapted by rotation thereof to move the bolts oppositely.

4. In a device of the class described the combination with a clamping plate having apertures therethrough to receive the impaling posts, said plate constructed of a sheet of metal having one portion folded over the other, producing a rounded back with the front or free ends overlapped and directed at an angle with the plane of contact of the clamping plate of oppositely movable notched bolts slidably engaged with the clamping plate and adapted to oppositely engage the impaling posts, flanges on said bolts adapted to afford a long bearing on the impaling posts, means operatively connected with one of the bolts and upon which the other bolt is pivot-ally engaged adapted by rotation from the end of the clamping plate to actuate said bolts oppositely.

5. A clamping member for a loose leaf binder comprising a sheet metal plate folded to provide a rounded back, parallel bottom and top members and the ends -of the plate overlapped providing a rearwardly beveled front and means rigidly connecting the top and bottom members.

6. A clamping plate for a loose leaf binder i comprising a single blank of metal folded to provide a hollow casing with the ends thereof overlapped and means rigidly connecting' opposite walls of the casing preventing the same springing outwardly.

7. In a loose leaf binder the combination with suitable locking mechanism and a clamping member for inclosing the same embracing a single blank of metal folded to provide a comparatively wide and shallow casing and the front of the casing formed by overlapping the ends of the blank and inclining the same rearwardly from the plane of the clamping surface.

S. In a device of the class described a clamping plate comprising a plate of metal shaped to aflord a round back, and side members and having the front ends overlapped and directed at an angle with the plane of the clamping surface, said side members having alined apertures therethrough to receive impaling posts and means for securing the plate to the posts in any adjustmeut.

9. In a device of the class described a clamping plate comprising a sheet of metal folded to provide a casing and apertured to receive impaling posts, a block in each end of the casing, said sheet having the edges thereof overlapped and angularly directed with respect to the clamping face of the plate.

In testimony whereof I have hereunto subscribed my name in the presence of two subscribing witnesses.

RALPH B. VILSON. fitnesses C. O. BROWN, RALPH L. VINANS. 

